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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_HEAP_HEAP_CONTROLLER_H_
#define V8_HEAP_HEAP_CONTROLLER_H_
#include <cstddef>
#include "src/allocation.h"
#include "src/heap/heap.h"
#include "testing/gtest/include/gtest/gtest_prod.h" // nogncheck
namespace v8 {
namespace internal {
class V8_EXPORT_PRIVATE MemoryController {
public:
MemoryController(Heap* heap, double min_growing_factor,
double max_growing_factor,
double conservative_growing_factor,
double target_mutator_utilization, size_t min_size,
size_t max_size)
: heap_(heap),
kMinGrowingFactor(min_growing_factor),
kMaxGrowingFactor(max_growing_factor),
kConservativeGrowingFactor(conservative_growing_factor),
kTargetMutatorUtilization(target_mutator_utilization),
kMinSize(min_size),
kMaxSize(max_size) {}
virtual ~MemoryController() {}
// Computes the allocation limit to trigger the next garbage collection.
size_t CalculateAllocationLimit(size_t curr_size, size_t max_size,
double gc_speed, double mutator_speed,
size_t new_space_capacity,
Heap::HeapGrowingMode growing_mode);
// Computes the growing step when the limit increases.
size_t MinimumAllocationLimitGrowingStep(Heap::HeapGrowingMode growing_mode);
protected:
double GrowingFactor(double gc_speed, double mutator_speed,
double max_factor);
double MaxGrowingFactor(size_t curr_max_size);
virtual const char* ControllerName() = 0;
Heap* const heap_;
const double kMinGrowingFactor;
const double kMaxGrowingFactor;
const double kConservativeGrowingFactor;
const double kTargetMutatorUtilization;
// Sizes are in MB.
const size_t kMinSize;
const size_t kMaxSize;
FRIEND_TEST(HeapControllerTest, HeapGrowingFactor);
FRIEND_TEST(HeapControllerTest, MaxHeapGrowingFactor);
FRIEND_TEST(HeapControllerTest, MaxOldGenerationSize);
FRIEND_TEST(HeapControllerTest, OldGenerationAllocationLimit);
};
class HeapController : public MemoryController {
public:
explicit HeapController(Heap* heap)
: MemoryController(heap, 1.1, 4.0, 1.3, 0.97, kMinHeapSize,
kMaxHeapSize) {}
// Sizes are in MB.
static const size_t kMinHeapSize = 128 * Heap::kPointerMultiplier;
static const size_t kMaxHeapSize = 1024 * Heap::kPointerMultiplier;
protected:
const char* ControllerName() { return "HeapController"; }
};
} // namespace internal
} // namespace v8
#endif // V8_HEAP_HEAP_CONTROLLER_H_
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